Yeah. They are pretty good and very good value for money. We went from Cloudfront -> Edgecast -> KeyCDN and each change reduced our costs. Cloudfront can become really expensive since they charge for each HTTP request in addition to bandwidth.
I was using KeyCDN until I discovered bunnyCDN at $0.01/GB.
Same here. Cloudfront was ridiculous. KeyCDN works great for us.
Why KeyCDN ? Why not MaxCDN or Fastly etc?
MaxCDN has shitty performance, terrible monitoring. We have to tell them when their servers are overloaded due to our monitoring detecting regions with super high SSL negotiation times.
MaxCDN performance is not great. Fastly charges for requests in addition to bandwidth.